TY - JOUR
T1 - Detached Eddy Simulation of Complex Separation Flows over a Modern Fighter Model at High Angle of Attack
AU - Yang Zhang, Laiping Zhang, Xin He, Xiaogang Deng & Haisheng Sun
JO - Communications in Computational Physics
VL - 5
SP - 1309
EP - 1332
PY - 2017
DA - 2017/11
SN - 22
DO - http://doi.org/10.4208/cicp.OA-2016-0132
UR - https://global-sci.org/intro/article_detail/cicp/10444.html
KW - 
AB - <p style="text-align: justify;">This paper presents the simulation of complex separation flows over a modern
fighter model at high angle of attack by using an unstructured/hybrid grid based
Detached Eddy Simulation (DES) solver with an adaptive dissipation second-order
hybrid scheme. Simulation results, including the complex vortex structures, as well as
vortex breakdown phenomenon and the overall aerodynamic performance, are analyzed
and compared with experimental data and unsteady Reynolds-Averaged Navier-Stokes
(URANS) results, which indicates that with the DES solver, clearer vortical flow
structures are captured and more accurate aerodynamic coefficients are obtained. The
unsteady properties of DES flow field are investigated in detail by correlation coefficient analysis, power spectral density (PSD) analysis and proper orthogonal decomposition
(POD) analysis, which indicates that the spiral motion of the primary vortex on
the leeward side of the aircraft model is highly nonlinear and dominates the flow field.
Through the comparisons of flow topology and pressure distributions with URANS
results, the reason why higher and more accurate lift can be obtained by DES is discussed.
Overall, these results show the potential capability of present DES solver in
industrial applications.</p>